I have good pressure, bladder tank seem to be full of water. The pump runs to long after it reaches 50psi

You have a air valve on top of the tank. Pop the valve and if water comes out the bladder's ruptured and the tank needs to be replaced. If you replace the bladder tank set the air pressure in the tank, (with the pump off and the system pressure bled off) at 2PSI under the cut in point. Good luck, Tom